'X Factor' is willing to shell out MILLIONS more to the winner, depending on how hard the soon-to-crowned champ works after the show.<!–more–>

Here's the deal — each contestant signed a contract which states that if they win the show, they will get their $5 million over a period of 5 years … $1 mil-per-year.

According to the contract, the $5 mil is an "advance" on any earnings the winner brings in from record sales, the official tour and more, during the 5 years.

But the earnings are not capped at $5 mil — if the performer generates more than $5 mil during the length of the deal, that person will get a cut of the profits. The more they sell, the more they rake in.

And there's more … the singer is entitled to even more cash for any live performances outside of the official tour — 30% of royalties from each gig — and that money does NOT count toward the original $5 mil.

The show is down to the final 5